compilerplugins/Makefile-clang.mk

   1 #
   2 # This file is part of the LibreOffice project.
   3 #
   4 # This Source Code Form is subject to the terms of the Mozilla Public
   5 # License, v. 2.0. If a copy of the MPL was not distributed with this
   6 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
   7 #
   8
   9 # Make sure variables in this Makefile do not conflict with other variables (e.g. from gbuild).
  10
  11 CLANG_COMMA :=,
  12
  13 ifeq ($(OS),WNT)
  14 CLANG_DL_EXT = .dll
  15 CLANG_EXE_EXT = .exe
  16 else
  17 CLANG_DL_EXT = .so
  18 CLANG_EXE_EXT =
  19 endif
  20
  21 ifeq ($(COMPILER_PLUGINS_CXX),)
  22 CLANGCXX=$(filter-out -m32 -m64 -fsanitize%,$(CXX))
  23 else
  24 CLANGCXX=$(COMPILER_PLUGINS_CXX)
  25 endif
  26
  27 # Compile flags ('make CLANGCXXFLAGS=-g' if you need to debug the plugin); you
  28 # may occasionally want to override these:
  29 ifeq ($(OS),WNT)
  30 # See LLVM's cmake/modules/AddLLVM.cmake and LLVM build's
  31 # tools/llvm-config/BuildVariables.inc:
  32 # * Ignore "warning C4141: 'inline': used more than once" as emitted upon
  33 #   "LLVM_ATTRIBUTE_ALWAYS_INLINE inline" in various LLVM include files.
  34 # * Ignore "warning C4577: 'noexcept' used with no exception handling mode
  35 #   specified; termination on exception is not guaranteed. Specify /EHsc".
  36 CLANGCXXFLAGS=/nologo /D_HAS_EXCEPTIONS=0 /wd4141 /wd4577 /O2 /Oi /EHs-c- /GR-
  37 else
  38 CLANGCXXFLAGS=-O2 -Wall -Wextra -Wundef -g
  39 endif
  40
  41 # The uninteresting rest.
  42
  43 # Clang headers require these.
  44 CLANGDEFS=-D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
  45 ifneq ($(OS),WNT)
  46 CLANGDEFS += -fno-rtti
  47 endif
  48 # All include locations needed (using -isystem silences various warnings when
  49 # including those files):
  50 ifeq ($(OS),WNT)
  51 CLANGINCLUDES=-I$(CLANGDIR)/include
  52 else
  53 CLANGINCLUDES=$(if $(filter /usr,$(CLANGDIR)),,-isystem $(CLANGDIR)/include)
  54 endif
  55
  56 # Clang/LLVM libraries are intentionally not linked in, they are usually built as static libraries, which means the resulting
  57 # plugin would be big (even though the clang binary already includes it all) and it'd be necessary to explicitly specify
  58 # also all the dependency libraries.
  59
  60 CLANGINDIR=$(SRCDIR)/compilerplugins/clang
  61 # Cannot use $(WORKDIR), the plugin should survive even 'make clean', otherwise the rebuilt
  62 # plugin will cause cache misses with ccache.
  63 CLANGOUTDIR=$(BUILDDIR)/compilerplugins/obj
  64
  65 QUIET=$(if $(verbose),,@)
  66
  67 ifneq ($(ENABLE_WERROR),)
  68 ifeq ($(OS),WNT)
  69 CLANGWERROR :=
  70 #TODO: /WX
  71 else
  72 CLANGWERROR := -Werror
  73 endif
  74 endif
  75
  76 compilerplugins: compilerplugins-build
  77
  78 # The list of source files, generated automatically (all files in clang/, but not subdirs).
  79 CLANGSRC=$(foreach src,$(wildcard $(CLANGINDIR)/*.cxx), $(notdir $(src)))
  80 # Remember the sources and if they have changed, force plugin relinking.
  81 CLANGSRCCHANGED= \
  82     $(shell mkdir -p $(CLANGOUTDIR) ; \
  83             echo $(CLANGSRC) | sort > $(CLANGOUTDIR)/sources-new.txt; \
  84             if diff $(CLANGOUTDIR)/sources.txt $(CLANGOUTDIR)/sources-new.txt >/dev/null 2>/dev/null; then \
  85                 echo 0; \
  86             else \
  87                 mv $(CLANGOUTDIR)/sources-new.txt $(CLANGOUTDIR)/sources.txt; \
  88                 echo 1; \
  89             fi; \
  90     )
  91 ifeq ($(CLANGSRCCHANGED),1)
  92 .PHONY: CLANGFORCE
  93 CLANGFORCE:
  94 $(CLANGOUTDIR)/plugin$(CLANG_DL_EXT): CLANGFORCE
  95 endif
  96 # Make the .so also explicitly depend on the sources list, to force update in case CLANGSRCCHANGED was e.g. during 'make clean'.
  97 $(CLANGOUTDIR)/plugin$(CLANG_DL_EXT): $(CLANGOUTDIR)/sources.txt
  98 $(CLANGOUTDIR)/sources.txt:
  99         touch $@
 100
 101 compilerplugins-build: $(CLANGOUTDIR) $(CLANGOUTDIR)/plugin$(CLANG_DL_EXT)
 102
 103 compilerplugins-clean:
 104         rm -rf $(CLANGOUTDIR)
 105
 106 $(CLANGOUTDIR):
 107         mkdir -p $(CLANGOUTDIR)
 108
 109 CLANGOBJS=
 110
 111 ifeq ($(OS),WNT)
 112
 113 define clangbuildsrc
 114 $(3): $(2) $(SRCDIR)/compilerplugins/Makefile-clang.mk $(CLANGOUTDIR)/clang-timestamp
 115         @echo [build CXX] $(subst $(SRCDIR)/,,$(2))
 116         $(QUIET)$(CLANGCXX) $(CLANGCXXFLAGS) $(CLANGWERROR) $(CLANGDEFS) \
 117         $(CLANGINCLUDES) /I$(BUILDDIR)/config_host $(2) $(CXXFLAGS_CXX11) /MD \
 118         /c /Fo: $(3)
 119
 120 -include $(CLANGOUTDIR)/$(1).d #TODO
 121
 122 $(CLANGOUTDIR)/plugin$(CLANG_DL_EXT): $(3)
 123 $(CLANGOUTDIR)/plugin$(CLANG_DL_EXT): CLANGOBJS += $(3)
 124 endef
 125
 126 else
 127
 128 define clangbuildsrc
 129 $(3): $(2) $(SRCDIR)/compilerplugins/Makefile-clang.mk $(CLANGOUTDIR)/clang-timestamp
 130         @echo [build CXX] $(subst $(SRCDIR)/,,$(2))
 131         $(QUIET)$(CLANGCXX) $(CLANGCXXFLAGS) $(CLANGWERROR) $(CLANGDEFS) $(CLANGINCLUDES) -I$(BUILDDIR)/config_host $(2) -fPIC $(CXXFLAGS_CXX11) -c -o $(3) -MMD -MT $(3) -MP -MF $(CLANGOUTDIR)/$(1).d
 132
 133 -include $(CLANGOUTDIR)/$(1).d
 134
 135 $(CLANGOUTDIR)/plugin$(CLANG_DL_EXT): $(3)
 136 $(CLANGOUTDIR)/plugin$(CLANG_DL_EXT): CLANGOBJS += $(3)
 137 endef
 138
 139 endif
 140
 141 $(foreach src, $(CLANGSRC), $(eval $(call clangbuildsrc,$(src),$(CLANGINDIR)/$(src),$(CLANGOUTDIR)/$(src:.cxx=.o))))
 142
 143 $(CLANGOUTDIR)/plugin$(CLANG_DL_EXT): $(CLANGOBJS)
 144         @echo [build LNK] $(subst $(BUILDDIR)/,,$@)
 145 ifeq ($(OS),WNT)
 146         $(QUIET)$(CLANGCXX) /LD $(CLANGOBJS) /Fe: $@ $(CLANGLIBDIR)/clang.lib \
 147         mincore.lib version.lib /link $(COMPILER_PLUGINS_CXX_LINKFLAGS)
 148 else
 149         $(QUIET)$(CLANGCXX) -shared $(CLANGOBJS) -o $@ \
 150                 $(if $(filter MACOSX,$(OS)),-Wl$(CLANG_COMMA)-flat_namespace \
 151                         -Wl$(CLANG_COMMA)-undefined -Wl$(CLANG_COMMA)suppress)
 152 endif
 153
 154 # Clang most probably doesn't maintain binary compatibility, so rebuild when clang changes.
 155 $(CLANGOUTDIR)/clang-timestamp: $(CLANGDIR)/bin/clang$(CLANG_EXE_EXT)
 156         $(QUIET)touch $@
 157
 158 # vim: set noet sw=4 ts=4: